When the new page opens, you'll see your name and photo (if you've posted one) at the top of the page, and beneath it, several choices -- Dashboard, Your blogs, Posts, Comments, Favorites, and Profile. Click on "Posts".

When this page opens, you'll see "Published" and "Drafts". The page opens on "Published" by default -- this is a list of the posts you've published. You can search them by date, title or content. But you want to find that draft you started. So, click on "Drafts".

-- At the top you'll see a green box that says: "This post is a draft. You can publish at any time via its edit page." Click on the link to the "edit page", and you'll be able to edit and publish your post, or edit and save it as a draft again.